[PATCH 12/20] pinctrl: add i.MXRT driver

[Lukasz Majewski <lukma@denx.de>]

On Wed,  4 Dec 2019 18:44:31 +0100
Giulio Benetti <giulio.benetti@benettiengineering.com> wrote:

> Add i.MXRT pinctrl driver.
> 
> Signed-off-by: Giulio Benetti <giulio.benetti@benettiengineering.com>
> ---
>  drivers/pinctrl/nxp/Kconfig         | 14 ++++++++++
>  drivers/pinctrl/nxp/Makefile        |  1 +
>  drivers/pinctrl/nxp/pinctrl-imxrt.c | 40
> +++++++++++++++++++++++++++++ 3 files changed, 55 insertions(+)
>  create mode 100644 drivers/pinctrl/nxp/pinctrl-imxrt.c
> 
> diff --git a/drivers/pinctrl/nxp/Kconfig b/drivers/pinctrl/nxp/Kconfig
> index f2e67ca231..ec55351e61 100644
> --- a/drivers/pinctrl/nxp/Kconfig
> +++ b/drivers/pinctrl/nxp/Kconfig
> @@ -99,6 +99,20 @@ config PINCTRL_MXS
>  	  familiy, e.g. i.MX28. This feature depends on device tree
>  	  configuration.
>  
> +config PINCTRL_IMXRT
> +	bool "IMXRT pinctrl driver"
> +	depends on ARCH_IMXRT && PINCTRL_FULL
> +	select DEVRES
> +	select PINCTRL_IMX
> +	help
> +	  Say Y here to enable the imxrt pinctrl driver
> +
> +	  This provides a simple pinctrl driver for i.MXRT SoC
> familiy.
> +	  This feature depends on device tree configuration. This
> driver
> +	  is different from the linux one, this is a simple
> implementation,

Could you add proper documentation entry (in ./doc/*) in which you
would point out the differences between the full blown Linux driver and
this U-Boot driver (I do guess that "only parsing 'fsl,pins'" is not
the only difference - more details are welcome).

And a bit more generic request - it is also nice to add some kind of
./doc/README.* documentation in which one can put some hints (or usage
patterns) for in-uboot boards (like during development discovered HW
issues, etc.). Such information is priceless when other community
member wants to use this code/board (and NXP is very often silence
about them :-) ).

> +	  only parses the 'fsl,pins' property and configure related
> +	  registers.
> +
>  config PINCTRL_VYBRID
>  	bool "Vybrid (vf610) pinctrl driver"
>  	depends on ARCH_VF610 && PINCTRL_FULL
> diff --git a/drivers/pinctrl/nxp/Makefile
> b/drivers/pinctrl/nxp/Makefile index b86448aac9..066ca75b65 100644
> --- a/drivers/pinctrl/nxp/Makefile
> +++ b/drivers/pinctrl/nxp/Makefile
> @@ -8,3 +8,4 @@ obj-$(CONFIG_PINCTRL_IMX8)		+=
> pinctrl-imx8.o obj-$(CONFIG_PINCTRL_IMX8M)		+=
> pinctrl-imx8m.o obj-$(CONFIG_PINCTRL_MXS)		+=
> pinctrl-mxs.o obj-$(CONFIG_PINCTRL_VYBRID)		+=
> pinctrl-vf610.o +obj-$(CONFIG_PINCTRL_IMXRT)		+=
> pinctrl-imxrt.o diff --git a/drivers/pinctrl/nxp/pinctrl-imxrt.c
> b/drivers/pinctrl/nxp/pinctrl-imxrt.c new file mode 100644
> index 0000000000..4a93941927
> --- /dev/null
> +++ b/drivers/pinctrl/nxp/pinctrl-imxrt.c
> @@ -0,0 +1,40 @@
> +// SPDX-License-Identifier: GPL-2.0+
> +/*
> + * Copyright (C) 2019
> + * Author(s): Giulio Benetti <giulio.benetti@benettiengineering.com>
> + */
> +
> +#include <common.h>
> +#include <dm.h>
> +#include <dm/pinctrl.h>
> +
> +#include "pinctrl-imx.h"
> +
> +static struct imx_pinctrl_soc_info imxrt_pinctrl_soc_info = {
> +	.flags = ZERO_OFFSET_VALID,
> +};
> +
> +static int imxrt_pinctrl_probe(struct udevice *dev)
> +{
> +	struct imx_pinctrl_soc_info *info =
> +		(struct imx_pinctrl_soc_info
> *)dev_get_driver_data(dev); +
> +	return imx_pinctrl_probe(dev, info);
> +}
> +
> +static const struct udevice_id imxrt_pinctrl_match[] = {
> +	{ .compatible = "fsl,imxrt-iomuxc",
> +	  .data = (ulong)&imxrt_pinctrl_soc_info },
> +	{ /* sentinel */ }
> +};
> +
> +U_BOOT_DRIVER(imxrt_pinctrl) = {
> +	.name = "imxrt-pinctrl",
> +	.id = UCLASS_PINCTRL,
> +	.of_match = of_match_ptr(imxrt_pinctrl_match),
> +	.probe = imxrt_pinctrl_probe,
> +	.remove = imx_pinctrl_remove,
> +	.priv_auto_alloc_size = sizeof(struct imx_pinctrl_priv),
> +	.ops = &imx_pinctrl_ops,
> +	.flags = DM_FLAG_PRE_RELOC,
> +};




Best regards,

Lukasz Majewski

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